问题#1:
我有三个表; User
,UserRole
和UserRoleRelationships
(联接表)。UserRole
表包含我想要与用户关联的所有用户角色。当我插入新用户时,我想添加一个新用户并在联接表中添加一个新的关联。现在,当我运行插入新用户的查询时:
IWUser iwUser = new IWUser();
iwUser.setUsername("username");
iwUser.setFullName("fullName");
iwUser.setEmail("email");
iwUser.setPassword("password");
iwUser.setPrivatephone("55555");
iwUser.setWorkphone("777");
Set<IWUserRole> roleList = new HashSet<IWUserRole>();
IWUserRole iwUserRole = new IWUserRole();
iwUserRole.setRole("ROLE_USER");
roleList.add(iwUserRole);
iwUser.setUserRole(roleList);
iwUserManagementService.saveOrUpdate(iwUser);
Hibernate正在运行以下查询:
Hibernate: insert into dbo.Users (Username, Password, Email, Workphone, Privatephone, FullName) values (?, ?, ?, ?, ?, ?)
Hibernate: insert into dbo.UserRoles (Role) values (?)
Hibernate: insert into UserRoleRelationships (UserId, RoleId) values (?, ?)
我的Hibernate映射如下: :
<hibernate-mapping>
<class name="domain.IWUser" schema="dbo" table="Users">
<id name="userId" type="int">
<column name="UserId"/>
<generator class="native"/>
</id>
<property name="username" type="string">
<column name="Username" not-null="true"/>
</property>
<property name="password" type="string">
<column name="Password" not-null="true"/>
</property>
<property name="email" type="string">
<column name="Email" not-null="false"/>
</property>
<property name="workphone" type="string">
<column name="Workphone" not-null="false"/>
</property>
<property name="privatephone" type="string">
<column name="Privatephone" not-null="false"/>
</property>
<property name="fullName" type="string">
<column name="FullName" not-null="false"/>
</property>
<set cascade="all" inverse="false" name="userRole" table="UserRoleRelationships" lazy="true" >
<key>
<column name="UserId"/>
</key>
<many-to-many class="domain.IWUserRole" column="RoleId"/>
</set>
</class>
</hibernate-mapping>
IWUserRole.hbm.xml
:
<hibernate-mapping>
<class name="domain.IWUserRole" schema="dbo" table="UserRoles">
<id name="roleId" type="int">
<column name="RoleId"/>
<generator class="native"/>
</id>
<property name="role" type="string">
<column name="Role" not-null="true"/>
</property>
<set cascade="all" inverse="false" name="user" table="UserRoleRelationships" lazy="true">
<key>
<column name="RoleId"/>
</key>
<many-to-many class="domain.IWUser" column="UserId"/>
</set>
</class>
</hibernate-mapping>
如何让Hibernate在已有用户角色的情况下保存新用户于联结表中?
问题 #2:
当我更新用户时,Hibernate会删除联结表中的关系。如何避免这种情况发生?